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Negative weights using Dijkstra's Algorithm

I am trying to understand why Dijkstra's algorithm will not work with negative weights. Reading an example on Shortest Paths , I am trying to figure out the following scenario: ...
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How to leave a message for a github.com user

...mits. Ensure this is the case by clicking on the "View comparison..." link and make sure the user is listed as one of the committers. Clone on your local machine the repository they pushed to: git clone https://github.com/..../repository.git Checkout the branch they pushed to: git checkout [branch]...
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How should I edit an Entity Framework connection string?

... than delete it), saved the app.config changes, right-clicked the designer and chose Update Model From Database. The wizard then let me include the sensitive info (uid & pwd) in the connection string. Thanks! – DeveloperDan Mar 14 '11 at 15:41 ...
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Clean ways to write multiple 'for' loops

.../ ... } (or just: for ( auto& elem: m ) { } if you have C++11.) And if you need the three indexes during such iterations, it's possible to create an iterator which exposes them: class Matrix3D { // ... class iterator : private std::vector<int>::iterator { Matri...
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Why do some functions have underscores “__” before and after the function name?

This "underscoring" seems to occur a lot, and I was wondering if this was a requirement in the Python language, or merely a matter of convention? ...
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How can I test if a letter in a string is uppercase or lowercase using JavaScript?

... The answer by josh and maleki will return true on both upper and lower case if the character or the whole string is numeric. making the result a false result. example using josh var character = '5'; if (character == character.toUpperCase()) {...
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Getting View's coordinates relative to the root layout

Can I get a View's x and y position relative to the root layout of my Activity in Android? 10 Answers ...
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Choosing between std::map and std::unordered_map [duplicate]

... It is very important to understand that for some applications, worst case performance is crucial to know and is the deciding factor. For some hard real-time systems, having a linear worst case like the hashtable is not acceptable. std::map is always O(lg N...
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How do I disable a href link in JavaScript?

...ef="#"> Previous </a> 1 2 3 4 <a href="#"> Next </a> and in some conditions I want this tag to be completely disabled. ...
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Remove unnecessary svn:mergeinfo properties

...nk the idea is to just go to the dir that has all the messed up merge info and do it from there, so you don't have to revert the root directory. You don't want to mess with the mergeinfo of the root. – JeremyWeir Apr 26 '16 at 18:09 ...